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5cdcc99eba
Since backend.ID is always a slice of constant length, use an array
instead of a slice. Mostly, arrays behave as slices, except that an
array cannot be nil, so use `*backend.ID` insteaf of `backend.ID` in
places where the absence of an ID is possible (e.g. for the Subtree of a
Node, which may not present when the node is a file node).
This change allows to directly use backend.ID as the the key for a map,
so that arbitrary data structures (e.g. a Set implemented as a
map[backend.ID]struct{}) can easily be formed.
63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
package restic
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import (
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"path/filepath"
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"github.com/restic/restic/backend"
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"github.com/restic/restic/debug"
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"github.com/restic/restic/repository"
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)
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type WalkTreeJob struct {
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Path string
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Error error
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Node *Node
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Tree *Tree
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}
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func walkTree(repo *repository.Repository, path string, treeID backend.ID, done chan struct{}, jobCh chan<- WalkTreeJob) {
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debug.Log("walkTree", "start on %q (%v)", path, treeID.Str())
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t, err := LoadTree(repo, treeID)
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if err != nil {
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select {
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case jobCh <- WalkTreeJob{Path: path, Error: err}:
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case <-done:
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return
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}
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return
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}
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for _, node := range t.Nodes {
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p := filepath.Join(path, node.Name)
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if node.Type == "dir" {
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walkTree(repo, p, *node.Subtree, done, jobCh)
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} else {
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select {
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case jobCh <- WalkTreeJob{Path: p, Node: node}:
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case <-done:
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return
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}
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}
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}
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select {
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case jobCh <- WalkTreeJob{Path: path, Tree: t}:
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case <-done:
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return
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}
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debug.Log("walkTree", "done for %q (%v)", path, treeID.Str())
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}
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// WalkTree walks the tree specified by id recursively and sends a job for each
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// file and directory it finds. When the channel done is closed, processing
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// stops.
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func WalkTree(repo *repository.Repository, id backend.ID, done chan struct{}, jobCh chan<- WalkTreeJob) {
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debug.Log("WalkTree", "start on %v", id.Str())
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walkTree(repo, "", id, done, jobCh)
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close(jobCh)
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debug.Log("WalkTree", "done")
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}
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